First, use pesticides suitable for low temperature weather applications
In general, stomach poisons and contact poisons are less affected by temperature, and inhalants and fumigants are more affected by temperature. For pesticides such as the enemy killed, low temperature will obviously affect its insecticidal effect; and pesticides such as lime sulfur can still exert better insecticidal and bactericidal effects when applied at lower temperatures. In addition, herbicides are applied on a cold day, and their display effect is much longer than that of the hot season. Therefore, be patient and wait patiently as long as the liquid sprays into place, generally do not need to re-spray.
Second, choose sunny day high temperature medication
During the early winter and early spring when temperatures are high, the intake and respiratory intensity of pests is greater than that of cold weather, and the liquid sprayed on the insect body is brought into the body to a relatively greater extent, which is conducive to exerting a toxin-killing effect.
Third, the amount of medication should be appropriate
In the summer, pesticides are applied at regular dosages, and pests often eat and die. In late spring and early spring, due to climatic factors, pesticides have a slower effect. Therefore, when the efficacy is low, the concentration can be appropriately increased, depending on the temperature, but it is generally not more than 50% of the conventional dosage.
Fourth, preferential use of soil pesticides
Soil pesticides such as Bordeaux mixture, lime sulfur, etc., control pests are both economic and effective, but should pay attention to avoid injury.
Fifth, pay attention to the safety interval of pesticides
The application of pesticides in winter and early spring will slow down the degradation of pesticides and the relative lengthening of pesticides in crops. In the prevention and control of crop pests and diseases, special attention should be paid to prolonging the safety intervals of pesticides to ensure human health.
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